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<a name="1" href="#1">1</a>   <em class="comment">/*</em>
<a name="2" href="#2">2</a>   <em class="comment"> * @(#)ReflectionUtils.java     7 Nov 2008</em>
<a name="3" href="#3">3</a>   <em class="comment"> * </em>
<a name="4" href="#4">4</a>   <em class="comment"> * Copyright © 2009 Andrew Phillips.</em>
<a name="5" href="#5">5</a>   <em class="comment"> *</em>
<a name="6" href="#6">6</a>   <em class="comment"> * ====================================================================</em>
<a name="7" href="#7">7</a>   <em class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="8" href="#8">8</a>   <em class="comment"> * you may not use this file except in compliance with the License.</em>
<a name="9" href="#9">9</a>   <em class="comment"> * You may obtain a copy of the License at</em>
<a name="10" href="#10">10</a>  <em class="comment"> *</em>
<a name="11" href="#11">11</a>  <em class="comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="12" href="#12">12</a>  <em class="comment"> *</em>
<a name="13" href="#13">13</a>  <em class="comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a name="14" href="#14">14</a>  <em class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="15" href="#15">15</a>  <em class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or </em>
<a name="16" href="#16">16</a>  <em class="comment"> * implied.</em>
<a name="17" href="#17">17</a>  <em class="comment"> * See the License for the specific language governing permissions and</em>
<a name="18" href="#18">18</a>  <em class="comment"> * limitations under the License.</em>
<a name="19" href="#19">19</a>  <em class="comment"> * ====================================================================</em>
<a name="20" href="#20">20</a>  <em class="comment"> */</em>
<a name="21" href="#21">21</a>  <strong>package</strong> com.qrmedia.commons.reflect;
<a name="22" href="#22">22</a>  
<a name="23" href="#23">23</a>  <strong>import</strong> java.lang.reflect.Field;
<a name="24" href="#24">24</a>  
<a name="25" href="#25">25</a>  <em>/**<em>*</em></em>
<a name="26" href="#26">26</a>  <em> * Utility methods to retrieve and set field values via reflection.</em>
<a name="27" href="#27">27</a>  <em> * </em>
<a name="28" href="#28">28</a>  <em> * @author anph</em>
<a name="29" href="#29">29</a>  <em> * @since 7 Nov 2008</em>
<a name="30" href="#30">30</a>  <em> *</em>
<a name="31" href="#31">31</a>  <em> */</em>
<a name="32" href="#32">32</a>  <strong>public</strong> <strong>final</strong> <strong>class</strong> <a href="../../../../com/qrmedia/commons/reflect/ReflectionUtils.html">ReflectionUtils</a> {
<a name="33" href="#33">33</a>  
<a name="34" href="#34">34</a>      <em>/**<em>*</em></em>
<a name="35" href="#35">35</a>  <em>     * Attempts to set the &lt;i>instance&lt;/i> field of the target object with the given name </em>
<a name="36" href="#36">36</a>  <em>     * to the given value. The field may be declared in the target object's class or any </em>
<a name="37" href="#37">37</a>  <em>     * if its parent classes.</em>
<a name="38" href="#38">38</a>  <em>     * &lt;p></em>
<a name="39" href="#39">39</a>  <em>     * Makes the field accessible if necessary, e.g. if it is declared private.</em>
<a name="40" href="#40">40</a>  <em>     * &lt;p></em>
<a name="41" href="#41">41</a>  <em>     * Supports bean property names of the form &lt;code>property.childProperty&lt;/code>.</em>
<a name="42" href="#42">42</a>  <em>     * </em>
<a name="43" href="#43">43</a>  <em>     * @param target    the (non-&lt;code>null&lt;/code>) object whose field is to be set</em>
<a name="44" href="#44">44</a>  <em>     * @param propertyName the bean property name of the field to set</em>
<a name="45" href="#45">45</a>  <em>     * @param value the value to set the field to</em>
<a name="46" href="#46">46</a>  <em>     * @throws IllegalAccessException if the value could not be retrieved</em>
<a name="47" href="#47">47</a>  <em>     * @see #setValue(Class, String, Object)</em>
<a name="48" href="#48">48</a>  <em>     * @see #trySetValue(Object, String, Object)</em>
<a name="49" href="#49">49</a>  <em>     * @see #trySetValue(Class, String, Object)</em>
<a name="50" href="#50">50</a>  <em>     */</em>
<a name="51" href="#51">51</a>      <strong>public</strong> <strong>static</strong> <strong>void</strong> setValue(Object target, String propertyName, Object value) 
<a name="52" href="#52">52</a>              throws IllegalAccessException {
<a name="53" href="#53">53</a>          setPropertyValue(target, <strong>null</strong>, propertyName, value);
<a name="54" href="#54">54</a>      }
<a name="55" href="#55">55</a>  
<a name="56" href="#56">56</a>      <em class="comment">// support bean property names of the form property.childProperty</em>
<a name="57" href="#57">57</a>      <strong>private</strong> <strong>static</strong> <strong>void</strong> setPropertyValue(Object target, Class&lt;? <strong>extends</strong> Object> targetClass, 
<a name="58" href="#58">58</a>              String propertyName, Object value) throws IllegalAccessException {
<a name="59" href="#59">59</a>          <strong>int</strong> separatorIndex = propertyName.indexOf('.');
<a name="60" href="#60">60</a>          
<a name="61" href="#61">61</a>          <em class="comment">// for "plain" properties, simply set them</em>
<a name="62" href="#62">62</a>          <strong>if</strong> (separatorIndex == -1) {
<a name="63" href="#63">63</a>              setFieldValue(target, targetClass, propertyName, value);
<a name="64" href="#64">64</a>              <strong>return</strong>;
<a name="65" href="#65">65</a>          }
<a name="66" href="#66">66</a>          
<a name="67" href="#67">67</a>          <em class="comment">/*</em>
<a name="68" href="#68">68</a>  <em class="comment">         * Otherwise, retrieve the first property and recurse, ensuring *instance* fields</em>
<a name="69" href="#69">69</a>  <em class="comment">         * are used in the recursion.</em>
<a name="70" href="#70">70</a>  <em class="comment">         */</em>
<a name="71" href="#71">71</a>          setPropertyValue(getFieldValue(target, targetClass, 
<a name="72" href="#72">72</a>                                         propertyName.substring(0, separatorIndex)), 
<a name="73" href="#73">73</a>                           <strong>null</strong>, propertyName.substring(separatorIndex + 1), value);
<a name="74" href="#74">74</a>      }
<a name="75" href="#75">75</a>      
<a name="76" href="#76">76</a>      <em class="comment">// for an instance (static) field, targetClass (target) may be null</em>
<a name="77" href="#77">77</a>      <strong>private</strong> <strong>static</strong> <strong>void</strong> setFieldValue(Object target, Class&lt;? <strong>extends</strong> Object> targetClass,
<a name="78" href="#78">78</a>              String fieldName, Object value) throws IllegalAccessException {
<a name="79" href="#79">79</a>          
<a name="80" href="#80">80</a>          <strong>try</strong> {
<a name="81" href="#81">81</a>              Field field = getAccessibleField(
<a name="82" href="#82">82</a>                      (target != <strong>null</strong>) ? target.getClass() : targetClass, fieldName);
<a name="83" href="#83">83</a>              field.set(target, value);
<a name="84" href="#84">84</a>          } <strong>catch</strong> (Exception exception) {
<a name="85" href="#85">85</a>              <strong>boolean</strong> instanceFieldRequested = (target != <strong>null</strong>);
<a name="86" href="#86">86</a>              <strong>throw</strong> <strong>new</strong> IllegalAccessException(String.format(
<a name="87" href="#87">87</a>                      <span class="string">"Unable to set field '%s' on %s '%s' due to %s: %s"</span>, 
<a name="88" href="#88">88</a>                      fieldName, instanceFieldRequested ? <span class="string">"object"</span> : <span class="string">"class"</span>,
<a name="89" href="#89">89</a>                      instanceFieldRequested ? target : targetClass.getName(),
<a name="90" href="#90">90</a>                      exception.getClass().getSimpleName(), exception.getMessage()));
<a name="91" href="#91">91</a>          } 
<a name="92" href="#92">92</a>          
<a name="93" href="#93">93</a>      }
<a name="94" href="#94">94</a>      
<a name="95" href="#95">95</a>      <strong>private</strong> <strong>static</strong> Field getAccessibleField(Class&lt;? <strong>extends</strong> Object> targetClass,
<a name="96" href="#96">96</a>              String fieldName) throws SecurityException, NoSuchFieldException {
<a name="97" href="#97">97</a>          Class&lt;?> currentClass = targetClass;
<a name="98" href="#98">98</a>          Field field = <strong>null</strong>;
<a name="99" href="#99">99</a>  
<a name="100" href="#100">100</a>         <em class="comment">// the loop will be exited if the current class is Object.class and nothing is found</em>
<a name="101" href="#101">101</a>         <strong>do</strong> {
<a name="102" href="#102">102</a>             
<a name="103" href="#103">103</a>             <strong>try</strong> {
<a name="104" href="#104">104</a>                 field = currentClass.getDeclaredField(fieldName);
<a name="105" href="#105">105</a>             } <strong>catch</strong> (NoSuchFieldException exception) {
<a name="106" href="#106">106</a>                 
<a name="107" href="#107">107</a>                 <em class="comment">// try the superclass</em>
<a name="108" href="#108">108</a>                 currentClass = currentClass.getSuperclass();
<a name="109" href="#109">109</a>             }
<a name="110" href="#110">110</a>             
<a name="111" href="#111">111</a>         } <strong>while</strong> ((field == <strong>null</strong>) &amp;&amp; (currentClass != <strong>null</strong>));
<a name="112" href="#112">112</a>         
<a name="113" href="#113">113</a>         <strong>if</strong> (field == <strong>null</strong>) {
<a name="114" href="#114">114</a>             <strong>throw</strong> <strong>new</strong> NoSuchFieldException(fieldName);
<a name="115" href="#115">115</a>         }
<a name="116" href="#116">116</a>         
<a name="117" href="#117">117</a>         <strong>if</strong> (!field.isAccessible()) {
<a name="118" href="#118">118</a>             field.setAccessible(<strong>true</strong>);
<a name="119" href="#119">119</a>         }
<a name="120" href="#120">120</a>         
<a name="121" href="#121">121</a>         <strong>return</strong> field;
<a name="122" href="#122">122</a>     }
<a name="123" href="#123">123</a>     
<a name="124" href="#124">124</a>     <em>/**<em>*</em></em>
<a name="125" href="#125">125</a> <em>     * Attempts to set the &lt;i>static&lt;/i> field of the target class with the given name  </em>
<a name="126" href="#126">126</a> <em>     * to the given value. The field may be declared in the target class or any </em>
<a name="127" href="#127">127</a> <em>     * if its parent classes.</em>
<a name="128" href="#128">128</a> <em>     * &lt;p></em>
<a name="129" href="#129">129</a> <em>     * Makes the field accessible if necessary, e.g. if it is declared private.</em>
<a name="130" href="#130">130</a> <em>     * &lt;p></em>
<a name="131" href="#131">131</a> <em>     * Supports bean property names of the form &lt;code>property.childProperty&lt;/code>.</em>
<a name="132" href="#132">132</a> <em>     * Here, &lt;code>property&lt;/code> is expected to be a static field of the target class, </em>
<a name="133" href="#133">133</a> <em>     * whereas all further properties are assumed to be &lt;u>instance&lt;/u> fields of their</em>
<a name="134" href="#134">134</a> <em>     * parent objects.</em>
<a name="135" href="#135">135</a> <em>     * </em>
<a name="136" href="#136">136</a> <em>     * @param targetClass   the class whose static field is to be set</em>
<a name="137" href="#137">137</a> <em>     * @param propertyName the bean property name of the field to set</em>
<a name="138" href="#138">138</a> <em>     * @param value the value to set the field to</em>
<a name="139" href="#139">139</a> <em>     * @throws IllegalAccessException if the value could not be retrieved</em>
<a name="140" href="#140">140</a> <em>     * @see #setValue(Object, String, Object)</em>
<a name="141" href="#141">141</a> <em>     * @see #trySetValue(Object, String, Object)</em>
<a name="142" href="#142">142</a> <em>     * @see #trySetValue(Class, String, Object)</em>
<a name="143" href="#143">143</a> <em>     */</em>
<a name="144" href="#144">144</a>     <strong>public</strong> <strong>static</strong> <strong>void</strong> setValue(Class&lt;? <strong>extends</strong> Object> targetClass, String propertyName, 
<a name="145" href="#145">145</a>             Object value) throws IllegalAccessException {
<a name="146" href="#146">146</a>         setPropertyValue(<strong>null</strong>, targetClass, propertyName, value);
<a name="147" href="#147">147</a>     }    
<a name="148" href="#148">148</a> 
<a name="149" href="#149">149</a>     <em>/**<em>*</em></em>
<a name="150" href="#150">150</a> <em>     * Attempts to &lt;u>quietly&lt;/u> (i.e. without throwing exceptions) set the </em>
<a name="151" href="#151">151</a> <em>     * &lt;em>instance&lt;/em> field of the target object with the given name </em>
<a name="152" href="#152">152</a> <em>     * to the given value. The field may be declared in the target object's class or any </em>
<a name="153" href="#153">153</a> <em>     * if its parent classes.</em>
<a name="154" href="#154">154</a> <em>     * &lt;p></em>
<a name="155" href="#155">155</a> <em>     * Makes the field accessible if necessary, e.g. if it is declared private.</em>
<a name="156" href="#156">156</a> <em>     * &lt;p></em>
<a name="157" href="#157">157</a> <em>     * Supports bean property names of the form &lt;code>property.childProperty&lt;/code>.</em>
<a name="158" href="#158">158</a> <em>     * </em>
<a name="159" href="#159">159</a> <em>     * @param target    the (non-&lt;code>null&lt;/code>) object whose field is to be set</em>
<a name="160" href="#160">160</a> <em>     * @param propertyName the bean property name of the field to set</em>
<a name="161" href="#161">161</a> <em>     * @param value the value to set the field to</em>
<a name="162" href="#162">162</a> <em>     * @return  &lt;code>true&lt;/code> iff the value was successfully set, i.e. no exceptions</em>
<a name="163" href="#163">163</a> <em>     *          were thrown</em>
<a name="164" href="#164">164</a> <em>     * @see #trySetValue(Class, String, Object)</em>
<a name="165" href="#165">165</a> <em>     * @see #setValue(Object, String, Object)</em>
<a name="166" href="#166">166</a> <em>     * @see #setValue(Class, String, Object)</em>
<a name="167" href="#167">167</a> <em>     */</em>
<a name="168" href="#168">168</a>     <strong>public</strong> <strong>static</strong> <strong>boolean</strong> trySetValue(Object target, String propertyName, Object value) {
<a name="169" href="#169">169</a>         <strong>return</strong> trySetPropertyValue(target, <strong>null</strong>, propertyName, value);
<a name="170" href="#170">170</a>     }
<a name="171" href="#171">171</a>     
<a name="172" href="#172">172</a>     <strong>private</strong> <strong>static</strong> <strong>boolean</strong> trySetPropertyValue(Object target, 
<a name="173" href="#173">173</a>             Class&lt;? <strong>extends</strong> Object> targetClass, String propertyName, Object value) {
<a name="174" href="#174">174</a>         
<a name="175" href="#175">175</a>         <strong>try</strong> {
<a name="176" href="#176">176</a>             setPropertyValue(target, targetClass, propertyName, value);
<a name="177" href="#177">177</a>             <strong>return</strong> <strong>true</strong>;
<a name="178" href="#178">178</a>         } <strong>catch</strong> (IllegalAccessException exception) {
<a name="179" href="#179">179</a>             <strong>return</strong> false;
<a name="180" href="#180">180</a>         }
<a name="181" href="#181">181</a>         
<a name="182" href="#182">182</a>     }
<a name="183" href="#183">183</a> 
<a name="184" href="#184">184</a>     <em>/**<em>*</em></em>
<a name="185" href="#185">185</a> <em>     * Attempts to &lt;u>quietly&lt;/u> (i.e. without throwing exceptions) set the </em>
<a name="186" href="#186">186</a> <em>     * &lt;em>static&lt;/em> field of the target class with the given name  </em>
<a name="187" href="#187">187</a> <em>     * to the given value. The field may be declared in the target class or any </em>
<a name="188" href="#188">188</a> <em>     * if its parent classes.</em>
<a name="189" href="#189">189</a> <em>     * &lt;p></em>
<a name="190" href="#190">190</a> <em>     * Makes the field accessible if necessary, e.g. if it is declared private.</em>
<a name="191" href="#191">191</a> <em>     * &lt;p></em>
<a name="192" href="#192">192</a> <em>     * Supports bean property names of the form &lt;code>property.childProperty&lt;/code>.</em>
<a name="193" href="#193">193</a> <em>     * Here, &lt;code>property&lt;/code> is expected to be a static field of the target class, </em>
<a name="194" href="#194">194</a> <em>     * whereas all further properties are assumed to be &lt;u>instance&lt;/u> fields of their</em>
<a name="195" href="#195">195</a> <em>     * parent objects.</em>
<a name="196" href="#196">196</a> <em>     * </em>
<a name="197" href="#197">197</a> <em>     * @param targetClass   the class whose static field is to be set</em>
<a name="198" href="#198">198</a> <em>     * @param propertyName the bean property name of the field to set</em>
<a name="199" href="#199">199</a> <em>     * @param value the value to set the field to</em>
<a name="200" href="#200">200</a> <em>     * @return  &lt;code>true&lt;/code> iff the value was successfully set, i.e. no exceptions</em>
<a name="201" href="#201">201</a> <em>     *          were thrown</em>
<a name="202" href="#202">202</a> <em>     * @see #trySetValue(Object, String, Object)</em>
<a name="203" href="#203">203</a> <em>     * @see #setValue(Object, String, Object)</em>
<a name="204" href="#204">204</a> <em>     * @see #setValue(Class, String, Object)</em>
<a name="205" href="#205">205</a> <em>     */</em>
<a name="206" href="#206">206</a>     <strong>public</strong> <strong>static</strong> <strong>boolean</strong> trySetValue(Class&lt;? <strong>extends</strong> Object> targetClass, String propertyName, 
<a name="207" href="#207">207</a>             Object value) {
<a name="208" href="#208">208</a>         <strong>return</strong> trySetPropertyValue(<strong>null</strong>, targetClass, propertyName, value);
<a name="209" href="#209">209</a>     }
<a name="210" href="#210">210</a>     
<a name="211" href="#211">211</a>     <em>/**<em>*</em></em>
<a name="212" href="#212">212</a> <em>     * Attempts to get the value of specified &lt;i>instance&lt;/i> field from the given target </em>
<a name="213" href="#213">213</a> <em>     * object. The field may be declared in the target object's class or any if its</em>
<a name="214" href="#214">214</a> <em>     * parent classes.</em>
<a name="215" href="#215">215</a> <em>     * &lt;p></em>
<a name="216" href="#216">216</a> <em>     * Supports bean property names of the form &lt;code>property.childProperty&lt;/code>.</em>
<a name="217" href="#217">217</a> <em>     * </em>
<a name="218" href="#218">218</a> <em>     * @param &lt;T>       the type of the object to be returned</em>
<a name="219" href="#219">219</a> <em>     * @param target    the (non-&lt;code>null&lt;/code>) object from which to retrieve the value</em>
<a name="220" href="#220">220</a> <em>     * @param propertyName the bean property name of the field whose value is required</em>
<a name="221" href="#221">221</a> <em>     * @return  the field's value</em>
<a name="222" href="#222">222</a> <em>     * @throws IllegalAccessException if the value could not be retrieved</em>
<a name="223" href="#223">223</a> <em>     * @see #getValue(Class, String)</em>
<a name="224" href="#224">224</a> <em>     */</em>
<a name="225" href="#225">225</a>     <strong>public</strong> <strong>static</strong> &lt;T> T getValue(Object target, String propertyName) throws IllegalAccessException {
<a name="226" href="#226">226</a>         <strong>return</strong> ReflectionUtils.&lt;T>getPropertyValue(target, <strong>null</strong>, propertyName);
<a name="227" href="#227">227</a>     }
<a name="228" href="#228">228</a>     
<a name="229" href="#229">229</a>     <em class="comment">// support bean property names of the form property.childProperty</em>
<a name="230" href="#230">230</a>     <strong>private</strong> <strong>static</strong> &lt;T> T getPropertyValue(Object target, 
<a name="231" href="#231">231</a>             Class&lt;? <strong>extends</strong> Object> targetClass, String propertyName) 
<a name="232" href="#232">232</a>             throws IllegalAccessException {
<a name="233" href="#233">233</a>         String[] fieldNames = propertyName.split(<span class="string">"&#47;&#47;."</span>);
<a name="234" href="#234">234</a>         T value = ReflectionUtils.&lt;T>getFieldValue(target, targetClass, fieldNames[0]);
<a name="235" href="#235">235</a>         <strong>int</strong> numFieldNames = fieldNames.length;
<a name="236" href="#236">236</a>         
<a name="237" href="#237">237</a>         <em class="comment">// if the requested property was not a nested property, return it</em>
<a name="238" href="#238">238</a>         <strong>if</strong> (numFieldNames == 1) {
<a name="239" href="#239">239</a>             <strong>return</strong> ReflectionUtils.&lt;T>getFieldValue(target, targetClass, propertyName);
<a name="240" href="#240">240</a>         }
<a name="241" href="#241">241</a>         
<a name="242" href="#242">242</a>         <em class="comment">// recursively retrieve the properties, as *instance* properties</em>
<a name="243" href="#243">243</a>         <strong>for</strong> (<strong>int</strong> i = 1; i &lt; numFieldNames; i++) {
<a name="244" href="#244">244</a>             
<a name="245" href="#245">245</a>             <em class="comment">// will throw an NPE if one of the nested properties cannot be found</em>
<a name="246" href="#246">246</a>             value = ReflectionUtils.&lt;T>getFieldValue(value, <strong>null</strong>, fieldNames[i]);
<a name="247" href="#247">247</a>         }
<a name="248" href="#248">248</a>         
<a name="249" href="#249">249</a>         <strong>return</strong> value;
<a name="250" href="#250">250</a>     }
<a name="251" href="#251">251</a>     
<a name="252" href="#252">252</a>     <em class="comment">// for an instance (static) field, targetClass (target) may be null    </em>
<a name="253" href="#253">253</a>     @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="254" href="#254">254</a>     <strong>private</strong> <strong>static</strong> &lt;T> T getFieldValue(Object target, Class&lt;? <strong>extends</strong> Object> targetClass, 
<a name="255" href="#255">255</a>             String fieldName) throws IllegalAccessException {
<a name="256" href="#256">256</a>         <strong>boolean</strong> instanceFieldRequested = (target != <strong>null</strong>);
<a name="257" href="#257">257</a>         
<a name="258" href="#258">258</a>         <strong>try</strong> {
<a name="259" href="#259">259</a>             <strong>return</strong> (T) getAccessibleField(
<a name="260" href="#260">260</a>                     instanceFieldRequested ? target.getClass() : targetClass,  fieldName)
<a name="261" href="#261">261</a>                    .get(instanceFieldRequested ? target : <strong>null</strong>);
<a name="262" href="#262">262</a>         } <strong>catch</strong> (Exception exception) {
<a name="263" href="#263">263</a>             <strong>throw</strong> <strong>new</strong> IllegalAccessException(String.format(
<a name="264" href="#264">264</a>                     <span class="string">"Unable to get value of field '%s' of %s '%s' due to %s: %s"</span>, 
<a name="265" href="#265">265</a>                     fieldName, instanceFieldRequested ? <span class="string">"object"</span> : <span class="string">"class"</span>, 
<a name="266" href="#266">266</a>                     instanceFieldRequested ? target : targetClass.getName(),
<a name="267" href="#267">267</a>                     exception.getClass().getSimpleName(), exception.getMessage()));
<a name="268" href="#268">268</a>         }
<a name="269" href="#269">269</a>         
<a name="270" href="#270">270</a>     }    
<a name="271" href="#271">271</a>     
<a name="272" href="#272">272</a>     <em>/**<em>*</em></em>
<a name="273" href="#273">273</a> <em>     * Attempts to get the value of specified &lt;i>static&lt;/i> field of the given target </em>
<a name="274" href="#274">274</a> <em>     * class. The field may be declared in the target class or any if its parent classes.</em>
<a name="275" href="#275">275</a> <em>     * &lt;p></em>
<a name="276" href="#276">276</a> <em>     * Supports bean property names of the form &lt;code>property.childProperty&lt;/code>.</em>
<a name="277" href="#277">277</a> <em>     * Here, &lt;code>property&lt;/code> is expected to be a static field of the target class, </em>
<a name="278" href="#278">278</a> <em>     * whereas all further properties are assumed to be &lt;u>instance&lt;/u> fields of their</em>
<a name="279" href="#279">279</a> <em>     * parent objects.</em>
<a name="280" href="#280">280</a> <em>     * </em>
<a name="281" href="#281">281</a> <em>     * @param &lt;T>       the type of the object to be returned</em>
<a name="282" href="#282">282</a> <em>     * @param targetClass    the (non-&lt;code>null&lt;/code>) object from which to retrieve the value</em>
<a name="283" href="#283">283</a> <em>     * @param propertyName the bean property name of the field whose value is required</em>
<a name="284" href="#284">284</a> <em>     * @return  the field's value</em>
<a name="285" href="#285">285</a> <em>     * @throws IllegalAccessException if the value could not be retrieved</em>
<a name="286" href="#286">286</a> <em>     * @see #getValue(Object, String)</em>
<a name="287" href="#287">287</a> <em>     */</em>
<a name="288" href="#288">288</a>     <strong>public</strong> <strong>static</strong> &lt;T> T getValue(Class&lt;? <strong>extends</strong> Object> targetClass, String propertyName) 
<a name="289" href="#289">289</a>             throws IllegalAccessException {
<a name="290" href="#290">290</a>         <strong>return</strong> ReflectionUtils.&lt;T>getPropertyValue(<strong>null</strong>, targetClass, propertyName);
<a name="291" href="#291">291</a>     }    
<a name="292" href="#292">292</a>     
<a name="293" href="#293">293</a> }
</pre>
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